added fkeys and pkey to course_director table.
added fkeys and pkey to course_director table.

dartajax/ilios,stopfstedt/ilios,justinchu17/ilios,ilios/ilios,Trott/ilios,stopfstedt/ilios,ilios/ilios,justinchu17/ilios,thecoolestguy/ilios,Trott/ilios,justinchu17/ilios,thecoolestguy/ilios,dartajax/ilios,justinchu17/ilios